PHP not sending email from html - php

Question

I'm trying to make a form where the user introduces data and it gets submitted to e-mail.
However, it gets me to a blank page (file.php page), and the e-mail is not sent.
HTML code:
<form action="./sendmail.php" method="post">
<div class="log">
<input type="text" id="name" value="name" name="studname" class="form">
<input type="email" id="mail" value="mail#gmail.com" name="studmail" class="form">
<input type="tel" id="age" value="age" class="form" name="studage">
<input type="submit" value="submit!" id="submit">
</div>
</form>
And now here is my "sendmail.php" code:
<?php
/* STUDENT PARAMETERS */
$studentName = $_POST['studname'];
$studentMail = $_POST['studmail'];
$studentAge = $_POST['studage'];
mail('code#gmail.com', 'Message',
'NAME: ' . $studentName . '\nMAIL: ' . $studentMail . '\nAge: ' . $studentAge);
?>
How can I solve this and why is this not working? Thank you for your time.

Answer 1

I think you can use phpmailer class

Answer 2

#Telmo Vaz try this
<?php
$studentName = $_POST['studname'];
$studentMail = $_POST['studmail'];
$studentAge = $_POST['studage'];
$recipient='code#gmail.com';
$subject="Message";
$content = "New Message Form Contact us\n From: ".$studentName .", \n Email: ".$studentMail .",\n Age: ".$studentAge;
$headers = 'From: code#gmail.com' . "\r\n" .
'Reply-To: code#gmail.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
$retval=mail($recipient, $subject, $content, $headers);
if( $retval == true ){do something;}
else{echo "Error Sending Message";}
?>

Answer 3

You need an email address to send the email from. The email won't be send from this address, but the selected address will be shown in the "From" section. Try this:
/* STUDENT PARAMETERS */
$studentName = $_POST['studname'];
$studentMail = $_POST['studmail'];
$studentAge = $_POST['studage'];
$to = "code#gmail.com";
$subject = "Message";
$message = "NAME: " . $studentName . "\nMAIL: " . $studentMail . "\nAge: " . $studentAge;
$from = $to;
$headers = "From:" . $from;
mail($to,$subject,$message,$headers);
echo "Mail Sent.";